Topic 5, Lesson 1

Amount of water, what an organisms eats, how it eats, and what it eats are all factors that determine an organism's niche.

• true

• false

Four different mammals all live among oak and maple trees in a forest. They don't seem to compete for the same foods or nesting places. Which of the following is a likely explanation for this lack of competition?

• their small size is a limiting factors

• there is no shortage of food

• the four species occupy different niches.

• there is no shortage of space

To reduce competition, the role of an organism in its habitat is called its

• adaptation

• niche

• host

• parasite

In which type of interaction do both species benefit?

• predation

• mutualism

• commensalism

• Parasitism

A relationship in which one species benefits and the other species is neither helped nor harmed.

• parasitism

• commensalism

• mutualism

symbiosis is any relationship in which two species live closely together.

• true

• false

Competition is the struggle between organisms to survive as they use the same limited resources.

• True

• False